Frederick mutimer



. tion.

"UNITED STATES PATENT OFFTCE.

FREDERICK MUTIMER, OF ROCKFORD, ILLINOIS, ASSIGNOR OF ONE- HALF TO THE ROOKFORD BOLT WORKS, OF SAME PLACE.

BOLT-HEADING MACHINE.

SPECIFICATION forming part of Letters Patent No. 442,074, dated December 2, 1890.

Application filed August 9, 1890. Serial No. 361.597. (No model.)

To @ZZ whom if; nw/y concern:

Be it known that I, FREDERICK MUTIMER,

a citizen of the United States,residing at Rockford, in the county of Winnebago and State of Illinois, have invented certain new and useful Improvements in Bolt-Heading Machines, of which the following is a specification.

The object of this invention is to construct a bolt-heading machine in which a break-iron is employed to prevent injury to the dies, also in which a stationary knife is employed, the faces of the knife made interchangeable, so as to present new cutting-surfaces.

In the accompanying drawings, Figure I is a plan view of such portions of a bolt-heading lnachine with which my improvements are closely connected. Fig. 2 is a fragmental View of the oscillating jaw, movable and stationary dies. Fig. 3 is an isometrical representation of the die-operating arm, showing the two sections composing the same and the manner otl forming their hinge-joint connec- Fig. 4f is an isometrical representation of the break-iron. Fig. 5 is an isometrical representation of the stationary knife.

The main frame is of rectangular form, consisting oi' side bars 1 and end bars 2. A crosshead 3, usually employed in this class of machines, is fitted to slide in guideways formed in the side bar of the main frame and is operated in the usual manner through the medium ot' pivoted link 4 andl cam-roller 5, to which a rotary movement is imparted in the usual manner. This eross-head has a die-op erating bar connected or cast integral therewith, and consists of a rigid portion 6, having asection hinge-jointed at its free end, and a pin 8 holds the parts in their proper position. The free end of the section 7 is beveled, as shown at i), for a purpose to appear hereinafter.

In the front end of the machine is located one half l0 of a die and behind it is located a knife-carrying block 1l. The knife l2 is a rectangular bar of steel placed in a groove formed in the face of its carrying-block. An opening I3 is so located that one side will be formed by the edge IlC of the knife, as shown at Fig. 5.

The movable part l5 of the die is carried in a jaw 1G, which has a pivotal connection with a stationary support at 'its lower end. The upper end of this jaw is beveled and corresponds with the `bevel 9 ot the arm, A break-iron I7 is located in a recess formed in the face of one of the side bars of the main frame, and a wearing-plate 1S is placed between the die-closing arm and break-iron.

In operating my improved bolt-heading machine the end of a rod from which the bolts are made is passed through the opening in the knife-holding block. An advance movement is imparted to the sliding cross-head which carries the die-closin g bar with it. The incline face of the bar will engage the inclined upper face of the pivoted jaw and as the bar advances the jaw will be moved on its pivot, thereby bringing the part of the die it carries in contact with the rod projecting through the knife-carrying block. A continued movement in this direction will force the rod against the edge of the knife, thereby severing it. The movable portion of the die will then clamp the severed rod between its face and the face of the stationary portion of the die,when the head is formed in the usual manner. Then the jaw-closing bar forces the jaw closed, its flat face will rest in contact with the wearing-plate 18 and the strain will be borne by the break-iron I7, and should any hard substance come between the flat portions of the stationary and movable portions of the die which would prevent them from closing in a proper manner the break-iron will crush as the die-closing arm advances, thereby preventing the breaking of the machine, and by making the bar in two sections hinge-jointed together the outer section will move on its hinge-joint when the break-iron crushes,which prevents the wrenching of the bar, and when necessary to remove the vbar the pivot-bolt can be removed, thereby permitting the removal of the hinged portion. 2y locating the break-iron in a recess formed in the face ofv the main frame and outside of the jaw-clos- 9 Aing bar the crushed fragments can be easily removed and a new iron inserted.

' By employing the rectangular-shaped knife I can change it in its socket or recess so as to bring any one ol' its lengthwise faces in posi- IOO tion to receive the bolt and out the saine from' the rod, thereby presenting four times the eut! ting-surfeoe of a stationary knife.

I claim as my invention- 1. In a bolt-heading1naehine,the combination of t movable die, a break-iron, and zt diemoving arxn located between the die and break-iron, snbstantially as set forth.

In a bolt-heading machine, the combination of a movable die, a break-iron, and n twopart die-moving arm located between the die and break-iron, substantially as set forth.

In L bolt-heading maohinezt die-moving arm com posed of two sections having a hingejoint connection, substantially as set forth.

FREDERICK MUTIMER.-

Witnesses:

C. R. WISE, A. O. BEHEL. 

